23621045449 has 2 divisors, whose sum is σ = 23621045450. Its totient is φ = 23621045448.

The previous prime is 23621045411. The next prime is 23621045467. The reversal of 23621045449 is 94454012632.

23621045449 = T₁₂₅₄₈₇ + T₁₂₅₄₈₈ + T₁₂₅₄₈₉.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19668660025 + 3952385424 = 140245^2 + 62868^2 .

It is a cyclic number.

It is not a de Polignac number, because 23621045449 - 2⁷ = 23621045321 is a prime.

It is a super-2 number, since 2×23621045449² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23621045489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11810522724 + 11810522725.

It is an arithmetic number, because the mean of its divisors is an integer number (11810522725).

Almost surely, 2^23621045449 is an apocalyptic number.

23621045449 is the 125489-th centered triangular number.

It is an amenable number.

23621045449 is a deficient number, since it is larger than the sum of its proper divisors (1).

23621045449 is an equidigital number, since it uses as much as digits as its factorization.

23621045449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 23621045449 in words is "twenty-three billion, six hundred twenty-one million, forty-five thousand, four hundred forty-nine".